Energy polmerizable compositions containing organometallic initiators
AssigneeMinnesota Mining and Manufacturing Company
InventorMichael C. Palazzotto
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Abstract
An energy polymerizable composition and process therefore, comprising a cationically polymerizable material and a catalytically effective amount of an ionic salt of an organometallic complex cation as polymerization initiator, said ionic salt of an organometallic complex cation being capable of adding an intermediate strength nucleophile or upon photolysis capable of liberating at least one coordination site, said metal in said organometallic complex cation being selected from elements of Periodic Groups IVB, VB, VIB, VIIB, and VIIIB are disclosed. Certain of the organometallic metallic polymerization initiators are novel cationic salts.
Claims21
An energy polymerizable composition comprising a cationically polymerizable material selected from the group consisting of cyclic ethers, vinyl ethers, N-vinyl compounds, cyclic formals, and cyclic organosiloxanes, and a catalytically effective amount of an ionic salt of an organometallic complex cation and a halogen containing complex anion of a metal or metalloid, said ionic salt being capable of adding an intermediate strength nucleophile or upon photolysis capable of liberating at least one coordination site, the metal in said organometallic complex cation being selected from elements of Periodic Groups IV, VI, VIB, VIIB, and VIIIB, the total charge on said metal in said cation resulting in a net residual positive charge to said complex.
A process of polymerizing cationically polymerizable materials comprising the steps:
- a. admixing a cationically polymerizable material selected from the group consisting of cyclic ethers, vinyl ethers, N-vinyl compounds, cyclic formals, cyclic organosiloxanes, with a cationically effective amount of an ionic salt of an organometallic complex, said ionic salt of an organometallic complex cation being capable of adding an intermediate strength nucleophile or upon photolysis capable of liberting at least one coordination site, said metal in said organometallic complex being selected from elements of Periodic Groups IVB, VB, VIB, VIIB, VIIIB, and
- b. curing the resulting admixture with at least one of a thermal and actinic radiation source.
Dependencies are inferred from the claim text.